A long sleeve t-shirt and blue jeans? This is an easy-to-achieve ensemble that anyone can wear a variation of on a daily basis. And if you want to immediately lift up this ensemble with one single item, why not complete this outfit with a pair of chelsea boots? Keep this outfit ready to go when spring comes, and we promise you'll save a lot of time getting dressed on more than one occasion. Wondering how to nail casual looks as you move into your 30s? This pairing is a practical example.